We have breaking news tonight. Two men under arrest in a terror plot. They are naturalized citizens of pakistani decent living in south florida and's senior justice correspondent pierre thomas joins us now with all the breaking details. Pierre? Reporter: Diane, tonight, the fbi believes it has stopped a plot of home grown terror that while in its early stages, could have been deadly. Tonight, two ft. Lauderdale men are in custody, accused of plotting to detonate a bomb in the u.S. Homeland. The two men, brothers, are identified at naturalized citizens from pakistan. Sources tell abc news, this was not a sting. And that the younger brother had been in contact with overseas radicals, possibly connected to al qaeda. The indictment accuses the men of attempting to provide lodging, communications, equipment and transportation in a conspiracy to use a weapon of mass destruction. And sources say the fbi found evidence that the younger brother has been monitoring sting cases who authorities say infiltrating the alleged conspiracy was a nonstarter. And pierre, any indication of how many may be involved? Reporter: Diane, this case is active and ongoing. They are looking at potential suspects overseas and there could be more arrests right here at home.

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